Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

FS#607 - Kernel BUG: Bad page state in process ntpd-hotplug #7098

Closed
openwrt-bot opened this issue Mar 8, 2017 · 1 comment
Closed

FS#607 - Kernel BUG: Bad page state in process ntpd-hotplug #7098

openwrt-bot opened this issue Mar 8, 2017 · 1 comment
Labels

Comments

@openwrt-bot
Copy link

bjonglez:

While doing wireless benchmarks between two TP-Link WR841 running the latest LEDE, one of them (the AP) showed the stack trace below. It does not seem to impact the behaviour of the system, though: everything seems to work correctly after the stack trace.

The device is TL-WR841N v8, with a snapshot build r3670-154b3a6 (kernel is 4.4.52).

It occurred about one minute after I plugged the WAN port to the Internet, which explains why ntpd-hotplug appears in the log. There was still a heavy amount of wireless traffic (both when I plugged the WAN, and when the stack trace occurred).

Wed Mar 8 22:02:31 2017 kern.alert kernel: [ 1913.427453] BUG: Bad page state in process ntpd-hotplug pfn:015fa Wed Mar 8 22:02:31 2017 kern.emerg kernel: [ 1913.433936] page:8102bf40 count:-2130657536 mapcount:16711936 mapping: (null) index:0xff00ff00 Wed Mar 8 22:02:31 2017 kern.emerg kernel: [ 1913.442939] flags: 0x0() Wed Mar 8 22:02:31 2017 kern.alert kernel: [ 1913.445561] page dumped because: nonzero _count Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.450237] Modules linked in: ath9k ath9k_common pppoe ppp_async ath9k_hw ath pppox ppp_generic nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_coWed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.509878] CPU: 0 PID: 1501 Comm: ntpd-hotplug Not tainted 4.4.52 #0 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.516549] Stack : 803e49f0 00000000 00000001 80440000 818f16a4 8042ee63 803c5ff4 000005dd Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.516549] 804a378c 803d0000 803d0000 803d0000 803d0000 800a7640 803cb6e4 80430000 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.516549] 00000003 803d0000 803c9af0 81809d74 803d0000 800a55bc 803d0000 803d0000 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.516549] 803d0000 801f5800 00000000 00000000 00000000 00000000 00000000 00000000 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.516549] 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.516549] ... Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.553574] Call Trace: Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.556121] [<80071eb0>] show_stack+0x50/0x84 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.560630] [<800d57e4>] bad_page+0xec/0x11c Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.565069] [<800d59b0>] free_pages_prepare+0x19c/0x1f8 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.570474] [<800d6c74>] __free_pages_ok+0x2c/0x31c Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.575554] [<80261278>] __kfree_skb+0x28/0xb0 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.580155] [<8023871c>] ag71xx_tx_packets+0x154/0x2c8 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.585486] [<80239530>] ag71xx_poll+0x6c/0x5c0 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.590203] [<8026f748>] net_rx_action+0x10c/0x2c8 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.595183] [<800841c8>] __do_softirq+0x250/0x298 Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.600066] [<8006a9e0>] plat_irq_dispatch+0xd4/0x10c Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.605297] Wed Mar 8 22:02:31 2017 kern.warn kernel: [ 1913.606843] Disabling lock debugging due to kernel taint
@openwrt-bot
Copy link
Author

bjonglez:

It seems a bit similar to FS#175, but I'm really not sure if the cause is the same.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
Projects
None yet
Development

No branches or pull requests

1 participant